MP2487

55V, 1A

High Power LED Driver

MP2487 Rev. 1.0

www.MonolithicPower.com

1

9/22/2011

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2487 is a fixed frequency step-down

switching regulator to deliver a constant current

of up to 1A to high power LEDs. It integrates a

high-side, high voltage power MOSFET with a

current limit of 1.5A. The wide 4.5V to 55V input

range accommodates a variety of step-down

applications, making it ideal for automotive,

industry and general lighting applications. Peak

current mode control and 200mV reference are

applied

for

fast

loop

response,

easy

compensation

and

accurate

LED

current

regulation.

The

switching

frequency

is

programmable with an external resistor up to

200kHz,

which

can

prevent

EMI

(Electromagnetic Interference) noise problems.

The thermal shut down provides reliable, fault

tolerant operations. A 12µA quiescent current in

shutdown mode allows its use in battery-

powered applications.

The MP2487 is available in a SOIC8E package.

FEATURES

• Wide 4.5V to 55V Operating Input Range

• 220mΩ Internal Power MOSFET

• Up to 200kHz Programmable Switching

Frequency

• 130μA Quiescent Current

• Ceramic Capacitor Stable

• Internal Soft-Start

• Up to 97.5% Efficiency

• 200mV

Reference

Voltage

for

High

Efficiency

• Available in a SOIC8E Package

APPLICATIONS

• High Power LED Driver

• Automotive, and General Lighting

• Constant Source

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“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP2487

COMP

FB

FREQ

EN

VIN

GND

SW

BST

8V to 55V

CONTROL

D1

LED-

LED+

L1

Efficiency vs. Input Voltage

10 WLED@330mA

INPUT VOLTAGE(V)

90

92

94

96

98

100

30

35

40

45

50

55

60